Method of making a stitch.



P. W. SHAW.

METHOD 0F MAKING A.sT|TcH. APF'LICTION FILED IUNE 20, `194.

1 .189,894. Patented July 4, 1916. i

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UNITED STATES TATENT oEEIcE.

PERCY SHAW, OF LYNN, MASSACHUSETTS, ASSIGNOB, TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY', A CORPORATION OF NEW JERSEY.

METHOD F MAKING A STITCH.

Specification of Letters Patent.

'Patented Juif-,y 4, 1916.

Application led .Tune 20, 1914. Serial No. 84=G,5%"".3.v

description of the inventlon, such as will enable others skilled in the art to which it appertans to make and use the'same.

The present invention relates to an improved method of making a' stitch and more particularly to a lockstitch made with a single thread.

The 'object of the present invention is to provide a simple and expeditious method of forming a lockstitch with a hooked needle which may be practised either manually or with a sewing machine, and which insures the llocking ofv each stitch securely in the wor With this end in view one feature of the invention consists in passing two loops of thread-successively through the work, passing the second loop of thread through the first, releasing the thread, and pulling upon the su ply end of the thread to draw the encirc stitch.

' The invention will be clearly understood from an inspection of the accompanying drawing which illustratessomewhat diagrammatically the successive operations which are preferably performed upon the thread in practising the method of the present invention.

Referring to the drawing Figure 1 illu'strates the needle with a loop of thread engaged thereby preparatory-to passing the of thread through the work; Fi 2 illustrates the needle after a relative feein movement has been imparted to the wor and needle and preparatory to the. engagement of the second loop; Fig. 3 illustrates the-operation ofplassing the second loopor` thread through t e worl` and through the first loop; and Fig. 4 shows the stitch after the take-up has actuated to` draw the encircling loop of thread into tlie'work fand lockl the stitch and the thread cutter is operated to sever the thread between the stitch and the supply.

- -[n the illustrated embodiment of 'the inf vention the stitch is employed .in the making;

ing loop into the work and lock the lclamp may also serve as a means for laying the bight of thread in the'barb of a hooked needle 7 which is advanced through thebase of the insole lip and the upper into a position to engage with the loop of thread, as;

' of boots a'nd shoes and is inserted through shown in Fig. 1. After the loco-of thread i has been laid in the barb of the'heedle, the needle is retracted While the short end .of the thread is clamped to draw 'afloop of thread through the work. After the loop has been drawn completelyf through the work a relative feeding movement is imparted lto the needle andthe work and the needle is again advanced, the loop of thread leavingl the barb of the needle and, sliding along Ithe shank into a position to engage with. a second lloop of thread. The thread clamp is then moved back to its initial position, llaying that portion of the thread between the clamp and the first loop in the stili barb of the needle, after which the needle is retracted, as shown clearly in Fig. 3, drawing the second loop of thread through the work and through the first loop, a cast-oli of any suitable form serving toprotect the barb of the needle and permitting the second loop to slide over the first. During the formation of the stitch the work is held in part by a channel guide 8 which may project into the channel of the insole, as shown clea'ily in the drawings.

In the illustrated embodiment of the in. vention a relative vertical feeding movement is imparted to the work and needle, causing 'the` needle `upon its second advancing move. .ment to pass inv close proximity to or above vthetop of the .insolei lip. In drawingthe second loop of thread through the work the needlev is retractedsuliiciently, as shown in A pppn .the supplyendpf ythe thread, thus 11 gg, insane@ binding' the second loop against the Work and locking the stitch, as shown clearly in Fig.L et. l iter the stitch has been set a thread cutting movement is imparted to the knife 10 to sever the thread in close proximity to the Work.

`With this'niode of operation a single thread locltstitch may be formed with a, hooked needle which is of considerable ad` Vantage as the thread will fit closely in the hole formed in the work to hold the parts securely in place as is well known to those skilled in the art.

The operations which are performed as above described and illustrated in the drav` ing are those which are preferred in practising the present invention. lt is to he understood, however, that except as defined in the claims the invention is not limited to the precise method illustrated and described.

l-laving explained the nature and object of the invention what is claimed is:

l. The method of making a stitch Which Consists in passing tvvo loops of thread successively through the work, passing the second loop of thread through the first, releasing the encircled loop, and pulling upon the supply end of the thread to'draw the encircling loop into the Work and' lool; the stitch.

2. The method of making a stitch which consists in passing two loops of thread successively through the work, passing the second loop of thread through the first, releasing the encircling loop, pulling upon the supply end of the thread to draw the encircling loop into the Work and lock the stitch, andv finally severing the supply thread in close proximity to the Work.`

3. The method of making a stitch which consists in passing a loop of thread through the work, relatively feeding the needle and work, passing a secondv loop lof thread through the worl' and through the first loop, releasing the encircled loop, and fnall drawing upon the supply end of the thread to draw' the encircling loop into the Work.

et. The method of making a stitch which consists in clamping the short end of the thread, passing a loop of thread through the work, relatively feeding the needle and work, engaging the thread between the first loop and the short end of the thread and passing a second loop of thread through the Work and through the first loop, releasing the thread, and finally drawing upon the supply end of the thread to draw the e11- oircling loop into the Work.

PERCY W. SHAW. Witnesses FRED LA CHAPELLE,` BURTON W. CARY.,- 

